Well, ..., when considering a 'first' telescope, I first suggest that you read the following article will give you some information on how different types of telescopes work, as well as, additional buying tips: http://www.raleighastro.org/observing/general-articles/102-purchasing-a-telescope
Now the best pricing for a decent first scope that I can suggest is a Dobsonian scope with a 6" or 8" mirror (e.g. Skywatcher Skyliner 150P Dobsonian - ~£215 or Skywatcher Skyliner 200P Dobsonian - ~£289). The lowest cost "beginner's" GoTo computerized scope that has astrophotography capability (meaning you still have to buy some accessories to make it fully astrophotography ready) is the Celestron NexStar 6SE at £798.00
The dobsonians I've suggested are great visual beginner scopes and are super for just taking out to the backyard for casual observing but will definitely hold their own at any amateur astronomy gathering. they're also easy for young people to use and operate. You can do short exposure astrophotography with them but not long exposure astrophotography (for that, as you saw above, you'll need a lot more money - See "Astrophotograpphy for Web Cams - Robert Reeves").
The Dobsonian scopes I mentioned and the Celstron NexStar 6SE will be much more durable and of higher quality tan any depsrtment store scope you'll find. Moreover, you'll be able to see all of the Messier objects (DSO's) plus many of the brighter NCG objects (DSO's), many many stars plus: Mercury, Venus, Earth's Moon, Mars, Jupiter and it's moons, Saturn, its rings and moons, Uranus, Neptune and the dwarf planet Pluto, as well as, many of the minor planets, comets, and asteroids. Plus, it's easy to transport, setup, and use (the dobsonians can be setup in under 60 seconds from car to ground ... no kidding).
Bottom Line: any scope with less than a 6" mirror with a 1200mm focal length, IMHO, would be a waste of money. See the links below for low priced dobsonian scopes with 6" and 8" mirrors. However, the larger the aperture (size of primary objective ... like an 6", 8", 10", 12" mirror or larger) the better. Also, there are many brands of dobsonian scopes made by many different companies that you can choose from. I only offered these as examples because they are popular with our club members.
For more advice I would suggest that you contact your local astronomy club. You don't have to own a telescope to join! Joining your local astronomy club is the best way to nurture your passion for astronomy. Plus, you'll find that they'll be able to provide you lots of great advice and support for acquiring and operating a telescope.
UK Links
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http://www.green-witch.com/acatalog/Dobsonian_Range.html
http://www.firstlightoptics.com/proddetail.php?prod=dobsky150
http://www.firstlightoptics.com/dobsonians/skywatcher-skyliner-200p-dobsonian.html
http://www.scsastro.co.uk/catalogue/orion-skyquest-xt6-classic.htm
http://www.firstlightoptics.com/se-series/celestron-nexstar-6se.html
http://www.firstlightoptics.com/dobsonians/skywatcher-skyliner-250px-dobsonian.html